Filter for oil, grease, and other substances.



G. G. SGURPIELD. OR OIL, GREASE, AND OTHER SUBSTANCES.

APPLIOATION nun APR. 9, 1909.

FILTER F Patented Sept. 24, 1912.

nun-w G. G. SGURPIELD. FILTER FOR OIL, GREASE, AND OTHER SUBSTANCES. APPLICATION FILED APILQ, 1909. 39 451 Patented Sept. 24, 1912.

a sufims-s1mm 2.

G. G. SGURFIELD. FILTER FOR OIL, GREASE, AND OTHER SUBSTANCES.

APPLIOATION FILED APR. 9,1009.

Patented Sept.24,1912

H 31 1 H 0 fla J a 00000000 0 00000000000 000015000000 000000000000 000000000000 000000000000 0012000000000 0000000000 -on o00o00oo0o 00 0000 ulu lLl GEORGE GOUTHWAIIE iSCURFIELD, F. GABLISLE, ENGLAND.

FILTER FOB, OIL, GREASE, AND OTHER SUBSTANCES.

Specification of Letters Patent.

Patented Sept. 24, 1916.23

Application filed April 6, 1908. Serial No. 488,790.

. Improvements in Filters for Oil Grease,

and other Substances, of 'ivhich the followin% is aspecification.

his inven'tion'is for improvements in or relating to filters for oil, grease and other substances of the ty )e wherein upper and lower vessels, divide bv a filtering medium are employed and its object is to rovide a filter which shall be quick and e cient in action and which can be readily cleaned.

A novel feature of this invention as applierlto the filtering of oil or grease consists in providing apparatus for thinning and warming the oil or grease by the use of steam'that is passed through it prior to filterin AIIOSUEI' feature consists in providing apparatus for the generation of steam in or the admission of steam direct to the receiving chamber, passing part of such steam from the chamber through the oil or grease to -thin and Warm it prior to filtering and condensing the remainder in the receiving chamber to create a partial vaciuun.

In the accompanying drawings, which 'illustrate one method of carrying out this invention :-Figure 1 is a central vertical section of the filter; Fig. 2 is a plan of the same Fi 3 is a ers ective view of a SH)- port employed Within the filter; Fig. 4 shows a portion of one form of perforated plate in plan, and Fig. 5 is a section through part of'an alternative form of apparatus.

Like letters indicate like parts throughout the drawings.

The apparatus comprises a Eiasing A which for convenience may be made in two or more pieces. This casing is divided into two chambersseparated by two perforated lates D D between which is ')llCQ(l the filtering medium E. This may e of felt, flannel, or other convenient material. The chamberB is closed by a cover A. having erforations A or other convenient device or placing the chamber in free co1nmunication with the atmosphere. Con'unnnicating with the up 61 portion of the lower chamber is a cool: F for the admission oi: exhaust or live steam.

The operation of this apparatusis as follows:-The lubricant is placed in the chamber B and steam is admitted to the chamber C. Some of this will find its Way through the filtering medium E to the upper chamber and thus coming into direct contact with the lubricant will thin the latter. When sufficient steam has been admitted, the cock F is shutoff and condensation takes place in the chamber C resulting in the production of a partial vacuum, and the lubricant in the chamber B being subjoct to the pressure oi the atmosphere is forced through the filtering mediuinll. The filter is designed in such a manner that it is impossible to get any r-txor-ssive pressure in it since i he sicam which is used for warming the oil has the oil above acting as a safety valve preventing accimiuliu'ion of pressure while the collapsing pressure due to the vacuum used for assisting the oil through the pads is of course autoumtically limited to that of the atmosphere; for these reasons the structural design of the filter can be comparatively light. The plates D D are perforated as shown at B and these perforations are enlarged or countersunk, as shown at l) on that side which is to 'aid the filtering medium. This allows the lubri cant passing through the orifices to come into direct contact with a larger area of the filtering medium than would otherwise be the case Without decreasing unnecessarily the strength of the plates and the etliciency and speed of action are thereby greatly enhanced. l t should be noted that the filtering: medium which only be of let or other suitable substance is suflicicntly still to bridge the countersunk holes D so that a wmsidrrabin area of the filtering, medium thus lies clear oi the plates and can be utilized for the passage of the substance to be filtered. in order that the apparatus may be readily cleaned, the casing A is conveniently made circular and may be divided at A. in which case the two parts may be secured together by bolts that engage opposed top plate or bottom mentioned packing K edge of the plate and 55 flanges The bolts, instead oientering orifices in these flanges, may engage in slots so that as soon as they are loosened they can be withdrawn laterally. The plate D rests on the loose support G which also stays both it and the bottom C against collapse when the vacuum is-formed in the receiving chamber C. This support G is conveniently. S-shaped, as shown'm Fig. 3, and being loose does not interfere with the cleaning of the parts. The upper perforated plate D is kept in place by screws D or similar devices.

' By removing the cover ing' the screws'D, the pl filtering .mediun may be lifted out, and by removing the upper po ion of the casing from the lower portion, when made-in separate parts, ready access may be had to all of the parts, oragain, one or both plates may be made with slots D* in the circumference, as shown in Fig. ing them slightly so as to bring the slots in register with the screws D one or both may be lifted out without disturbing the bolts or studs. The bottom C may be made in one piece, or ifrequired to be used with a stove or heater below it for the purpose hereinafter described, it may be made of very thin material and conveniently supported by a that is recessed to take the aforesaid thin bottom as shown and has at its edge a series of holes or slots A that register with holes or slots A in a flange A. Bolts and nutsA are entered in the slots A A. and serve to secure the bottom in place. To detach the bottom, where slots are used in place of holes, itis only necessary to loosen the nuts, when the bolts, with the nuts still thereon, can be'removed laterally. A compoundgage H for showin pressure and vacuum ma be fitted to and a cock J a ords means the filtered lubricants.

If, desired to insure that no liquid passes over the edge of the filtering medium the plate, or both, can be as shown in Fig. 5; also in some cases it may be more convenient to make the casing in one piece instead of two, as also shown in Fig. 5. The above is placed around the secured between the for drawing ,oii

fitted with packing,

plate and a clamping ring fitted into a V-shaped recess around the edge of the plate or plates. The edges of the plate or plates and clamping rings are oppositely beveled so as to expand the packing against any irregularity in the sides of the casing when pressure is put on the ring or rings. These rings are secured by bolts L that ap ly the requisite pressure.

ginother method of operation instead of heat.

A and withdraw ates D D with the I 4:, so that by turnthe c amber C,

L, or it may be 'steam s ace 'or 0 admitting Steam'tothe chamber 0 is to admit 21. small quantity of water to this charmthe steam in the chamber;

her and generate itself by the application of heat from bes neath by gas or other suitable-means. In

such cases the cock F is used for admitting the water from which the steam is generated and the whole apparatus will act as already described, the vacuum being formed by turning of? or removin the source of The cock F is itse straining device F as shown, to revent impurities from getting into this 0 amber either from the steam or from the water from which it is generated. I

What I claim as my invention and desire to secure by Letters Patent is 1. 'A filter of prising a receptaclehaving an up er space or chamber for the liquid to be lower steam space or chamber, a perforated plate having a plurality'of slots in its outer edge and forming the bottom of theliquid space or chamber, tending inwardly from the Wallkof theupper chamber for retaining the plate in position, said slots being arranged to be brought into register with said stops to permit the f fitted with a;

tered, a 1

a plurality of stopsex-.

removal of .said plate, another perforated plate forming the top of the chamber, and a plurality of super osed filter pads between saidpla-tes, said-pa. s and plates being capable of limited vertical movement in in said plates and the filteringrpads forming the onlypath for the liquid to the lower scribed. i a r 2. A filter or the character described, com- ..prising a receptacle having an upper space or chamber for the liquid. to be filtered, a lower steam space or chamber, a perforated, plate having a plurality of slots in its outer edge and forming space or chamber, a plurality of stops'extending inwardly from chamber for retaining said slots being arranged to be brought into register with said stops moval of said plate, another plate forming the top chamber, filter ads between'said plates,

perforated said pads and p ates' beingx capable of limited vertical together with movement-in t e chamber,

means for creatingi a m er; substantially as describe steam space or the chamber, the perforations:

om the upper- .chamber; substantially as dethe bottom of the liquid the wall of the upper the plate in position,

of the steam space or: and a plurality of superposed? artial vacuum in the to permit the re-v 3. A filter of the character described, comf I prising a receptacle having an up or chamber for the ligluid to belower steam space orc plate forming the b 'ttom of the-liquid space er space ltered, a

"1'2: amber, a perforated or chamber, another perforated plate forming the top of the steam space 01- chamber, In testimony whereof I have signed my and a plurality of superposed filter pads hename to this specification in the presence 01 tween said plates, said pads and plates two subscribing Witnesses.

being cepable of limited vertical movement GEORGE GOUTHWAITE SCURFIELD.

. 5 in the chamber, one of said plates having a Witnesses:

peripheral expansion packing, substantially HARRY ANTHONY PLOONA MAwsoN, as descrlbed. WILLIAM PATERSON. 

